Itchy skin on the face and neck may be associated with seborrheic dermatitis, contact dermatitis, actinic dermatitis, etc., and should be analyzed according to the clinical manifestations. 1. Seborrheic dermatitis: it occurs in areas with strong sebum secretion (such as the face and neck), resulting in light red or yellowish-red patches on the face and neck, which are covered with a few white greasy scales or scabs, and sometimes accompanied by itchy symptoms. 2. Contact dermatitis: Inflammation of the skin due to contact with certain substances (e.g. cosmetics or skin care products) can cause erythema, papules, blisters and other symptoms on the face and neck, accompanied by obvious itching. 3. Photochemical dermatitis: mainly occurs in the face and neck and other exposed areas, when the skin is allergic to ultraviolet rays, can cause skin inflammation, erythema, flaking, itching symptoms. In severe cases, blisters, oozing and other symptoms can also occur. When the skin of the face and neck appear itchy, should avoid scratching the itchy place, go to the hospital in time to consult the doctor, after clarifying the cause of the disease standardized treatment.